CVE-2022-20920 HIGH

CVE-2022-20920: Cisco IOS and IOS XE Software SSH Denial of Service Vulnerability

Vendor Cisco
Product Cisco IOS
Weakness CWE-755
Published October 10, 2022
Last update May 27, 2026
View on NVD All CVEs

CVSS base score

7.7/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

What the vulnerability does

01Description

A vulnerability in the SSH implementation of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, remote attacker to cause an affected device to reload. This vulnerability is due to improper handling of resources during an exceptional situation. An attacker could exploit this vulnerability by continuously connecting to an affected device and sending specific SSH requests. A successful exploit could allow the attacker to cause the affected device to reload.

Key dates

02Disclosure timeline

October 10, 2022 CVE published
May 27, 2026 Record updated